James o connor



J. O'CONNOR.

PUMP ER BELLOWS.

APPLICATlON FILED MAR 16, 1914- 1 ,1,93,594. Patented Aug. 8, 1916.

Witnesses: Inventor:

, his Attorney.

UNITED STATES PATENT OFFICE.

JAMES OCONNOR, OF NEW YORK, N. Y.

PUMPER-BELLOWS Application filed March 16, 1914.

To all whom it may concern Be it known that I, JAMES OCoNNon, a citizenof the United States, and a resident of New York, in the county of NewYork and State of New York, have invented certain new and usefulImprovements in Pumper-Bellows, of which the following is aspecification.

This invention relates to pumper bellows and has for its object toprovide a device of the class specified, of high power and greatpromptness of response in operation.

To these ends my improvements comprise parts and combinations of partsillustrated in their preferred form in the accompanying drawing whereinFigure 1 is a vertical sectional elevation of a pumper bellows includingmy improvements. Fig. 2 is a fragmentary front elevation of a part ofWhat is shown in Fig. 1, and Fig. 3 is a similar fragmentary frontelevation of another portion of what is shown in Fig. 1. Fig. 4 is asectional elevation similar to Fig. 1 illustrating the opera tion of thedevice. Figs. 1, 2 and 3 are to the same scale, and Fig. 4 is to asmaller scale.

Before describing the invention in detail, I desire to have itunderstood that the invention is not limited to the particularconstruction and arrangement of parts which I have illustrated and shallhereinafter describe, and that various changes may be made in themechanism shown without departing from the spirit or scope of theinvention, and that the phraseology which I employ is for the purpose ofdescription and not of limitation.

My improvements are particularly applicable to the exhausting mechanismof player pianos, and in the figures of the drawing I have illustratedmy improvements as applied to one of the well known types of pumperbellows, which are employed for exhausting the air from the operativemechanism of said player pianos.

Referring particularly to Fig. 1, the usual tension box 2 is providedwith pipe 3 which may connect said tension box with any apparatus fromwhich it is desired to exhaust the air. Bellows wall 4 is affixed tosaid tension box and may form one wall thereof. The second wall 5,movable relatively to wall 4, may be hinged at (3, in a well knownSpecification of Letters Patent.

Patented Aug. 8, 1916.

Serial No. 824,852.

manner, to said wall 4. Connecting said two walls 4 and 5, is the usualcollapsible wall 7. For moving wall 5 toward and from wall 4, I afiix towall 5 the usual ear 8 having pivotally connected thereto ooperatinglink 9. Ailixed to wall 4 is bracket 10, having stop 11 thereon forlimiting the stroke of wall 5, and spring 12 is provided for urging wall5 toward wall 4. Each of said walls 4 and 5 is provided with one or moreair passage ports therethrough, and for alternately closing and openingsaid ports, the usual valves 13 and 14 respectively, are provided. Thesevalvesmay be made of leather or other suitable material, and areillustrated as attached at one end thereof to the bellows wallsrespectively, and constrained to their operative positions by the usualspring, as 15 for valve 14. Heretofore, in devices of this character ithas been customary to make the area of the ports in one wallsubstantially the same as the area of the ports in the other wall. \Vhenconstructed with this equality of area. valve 13, over the ports in thefixed wall, is relatively slow or sluggish in closing, when the movablewall 5 starts on its return move ment toward wall 4. This slow closingof valve 13 is caused by the lack of suflicient pressure within thebellows to close said valve with desirable promptness and thus there isconsiderable leakage of air into the tension box, whereby the efficiencyof the pumper bellows is materially stultified.

In accordance with my improvements, wherein the aggregate area of theports through wall 5 is materially less than the aggregate area of theports through fixed wall 4, there is, upon the commencement of thereturn stroke of wall 5 toward wall 4, an immediate pressure availablein bellows 16, for closing valve 13 with great promptness, wherebyleakage from said bellows into the tension box, or from the outer airthrough the bellows into the tension box, is prevented. By thisarrangement, greatly increased efliciency is attained and the degree ofvacuum maintained in tension box 2 is relatively high.

As illustrated in the drawings, the aggregate area of ports 40 in wall4, is about three times the aggregate area of the ports 50 in wall 5.While I have found this to be a desirable proportion, said proportionmay be varied, but the area of the openings in wall l should bematerially greater than the area of the openings in wall 5.

In Fig. 1 I have illustrated the device with me ablewall 5 traveling inclockwise direction and nearing the end of its outer movement, valve 1stbeing closed and valve 123 of wall 4 being open. In Fig. at I haveillustrated wall just starting on its return or anti-clockwise movement,whereby valve 13 is promptly closed by the pressure of the air withinthe bellows, and valve 14 has just opened to permit the air of thebellows to escape.

I claim:

1. Pumper bellows including in combina' tion a tension box, a bellowswall fixed to said tension box, another bellows wall mov able toward andfrom said fixed wall, means for moving the movable wall toward and fromthe fixed wall, an air inlet port leading from within the tension box towithin the bellows, an air outlet port leading from within the bellowsto without the bellows, an air inlet valve to said inlet port and an airoutlet valve to said outlet port, said inlet port having a preponde'ance of area over the area of said outlet port whereby when the movablewall is moved toward the fixed wall an augmentation of pressure isproduced within the bellows for accele'ating the closing of said airinlet valve.

2. Pumper bellows including in combination a tensionbox, a bellows wallfixed to said tension box, another bellows wall movable toward and fromsaid fixed "all, means for moving the movable wall toward and from thefixed wall, a plurality of inlet ports leading from within the tensionbox to within the bellows, a plurality of outlet ports in the movablewall leading from within the belle to without the bellows, an air inletvalve to said inlet ports and an air outlet valve to said outlet ports,said inlet ports having a preponderance of area over the area of saidoutlet ports whereby when the movable wall is moved toward the lixed allan augmentation of pressure is produced within the bellows foraccelerating the closing of said air inlet valve.

Signed at New York, Bronx borough, in the county of Bronx and State ofNew York, this 13th day of March, 1914-, before two subscribingwitnesses.

JAMES OCONNOR.

\Vitnesses ARTHUR COURON, Guns. P. BOGART.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

